Speed-changing device.



D. 0. JAMES.

SPEED CHANGING DEVICE.

APPLICATION FILED APR. 20, 1909.

Patented Nov, 30, 1909.

1 x i k W 1 kx L QM am v m R m H Y Q mMQ MQ I a l q m4 .QQN i D. 0. JAMES.

SPEED CHANGING DEVICE.

APPLIOATION FILED-APR. 20, 1909.

m E m. V

0 a w a E DAVID ownn JAMES, OF CHICAGO, ILLINOIS.

SPEED-CHANGING DEVICE.

v Specification of Letters Patent.

Patented Nov. 30, 1909.

Application filed April 20, 1909. Serial No. 491,1os.

To all whom "it may concern:

Be it known that I, DAvIo OwEN JAMES, a citizen of the United States, residing in the city of Chicago, county of Cook, and State of Illinois, have invented a new and useful Improvement in Speed-Changing Des vices, of which the following is a specificatron. My invention relates to devices wherein the variations of speed are secured by trains of gearing housed in a casing in such a manner that the gearing is in a compact form, and lubrication of the gearing is efiected by what is called splash lubrication.

The invention consists in the devices and combinations thereof set forth in the claims.

Reference will be had to the accompanying drawings 'wherein Figure 1 is a vertical longitudinal sectional elevation of my device; Fig. 2 is a cross section on line 2-2 of Fi 1; Fig. 3

I is aside elevation of the coupllng used to connect the device with the driving and driven shafts; Fig. i is a detail of a pin fastening; Fig. 5 is a sectional detail 'of one of the pinions and its pin, and Fig. 6 is adetail of one of the oil deflector devices.

In the drawings, 1 indicates the base piece or supporting block, to which is secured a gear casing made of section 2 and section 3; the latter section being bolted securely to the former on section line 22 of Fig. 1,

in a manner to make an oil tight joint. A.

transmission shaft 4, being usually the shaft that is the driving part of the gearing and the higher s eeded shaft passed through a bushing 5 W ich forms the journal box at this end. The shaft 4 extends through a revolving pinion su porting block G'furnishing an axis there or,and terminates in a bearing 7 in the end of a revolving pinion plate 8, which is aninte'gral part of shaft 9, being the low speed and usually' the driven shaft. Bearing 7 is provided with a suitable bushing 10. On shaft 4: there is fixed a 1 pinion 11, which engages three pinions 12,

mounted equidistant from each other on pins fixed 17 into plate 6 and the pinions meshing into a set of fixed internal gear teeth 13 cut into the inside of the gear casing section 3. Thus as shaft ,4. revolves, it causes block 6 to revolve, but slower, through the medium of the pinions and internal gear teeth.

On an extension of block 6 there is a pinion 14 meshing into three pinions 15 mounted uponp'ins 16, and the pinions endescribe.

gage a ring of internal gear teeth 18 cut into the inslde of part 2 of the gear casing.

The block 6 is provided with a bushing 19,

for its bearing upon shaft 4.

Instead of gear rings 13 and 18be1ng cut into the casting casings, they may 'be cut.

as separate gears and fixed into the casings.

By thearrangement of the gears and pinions, as described, speed reductions are made, as it were, in two steps,- and the amount of-the reduction at each step is dependent on the ratio of the gearing. In order for these parts to run smoothly without undue loss from friction it is desirable that the shafts 4 and 9 be so connected to the connecting shafts that any bending or vibration of those shafts shall not be transmitted to shafts 4 and 9 so that they may run and, as

it were, seek their own center like a spinning top, as their speeds are usually high, and to save this friction loss I provide coupl ngs foreach shaft. These couplings are made of pieces 20, 21 and 22, made with dental jaws 23 and teeth 24 arranged so that slight bending and shocks of the outer shafts will be taken up by the slack of the clutch parts. i

The pins 16 and 17 are secured into their respective plates b having tapered pins 25 driven into t-apere holes 26 in the ends of the pins, the body of the pins at this point being slotted, as shown at 27,.to allow for expansion of the ends of the pins. Holes 28 in the pinions open on line with holes 29 In the sides of the pins, whereby a pumping action of the oil is produced which lubricates the pin-bearings.

It. is necessary that a device of this kind ping or wasteoil is objectionable, it is desirable to prevent the escape of the oil from be well oiled at all times, and-as these machines are usually located where any dripwithin the gear chamber out through and 3 along the journal boxes,- and as the ordinary means of preventing the escape of such oil are seriously objectionable because of undue friction on the shafts and the extra wear occasioned by these devices, I have invented the devices here shown, which I will now The bushing 5 is fitted so tightly to the casing where 1t passes out through the casing that no oil can escape there, and on the end of that bushing there is a flange 30 having a sharp edge 31, of larger diameter than the sideof the flange adjacent to the wall 32 of the casing 3. Thus there is produced an annular groove 33 extending around the flange.

On shaft4 there is secured a disk or flange 34: having a projecting ring 35 extending over not quite in contact wlth the wall of the casing and the projection has tapering or beveled faces inside and out. As the disk revolves with shaft 4 it throws, by centrifugal force, the oil out away from the line of escape of the oil to the journal along the face between the disk 3d and flange 30, and anyoil that does get between the projecting ring 35 and the wall of the ge'arcasmg is caught as it falls into the groove 33 and is carried around to the bottom of the gear casing. Enough oil follows down the face of the disk 34 to lubricate the surface between it and the bushing flange 30. At the other end of the gear casing, there is a similar construction to prevent the escape of the oil from the casing. Thus, the block 8 is provided with a beveled flange 36 of similar arrangement to the ring or projection 35, and instead of a flange 30 on the bushing 5, there is made a flange 37 on bushing 10 or this flange may be made on the inner wall of the gear casing, so shaped that there is an oil groove 38 to carry the oil around and deflect it from escaping to the journal. The oil is supplied to the parts by the aperture 39 and the oil cups 40. I

What I claim and desire to secure by Letters Patent is:

1. The combination with an oil containing gear casing, of shafts extending into the casing upon opposite sides, oil-splashing gearing within the casing and connecting the shafts, and disks mounted on the shafts, respectively within the casing and provided with annular lateral flanges extending toward the wall through which the corresponding shaft enters, said casing being provided with annular divergent flanges surrounding the entering shafts and projecting against the corresponding disks.

2. The combination with an oil containing casing provided with a bearing for an en -tering shaft and with an internal annular divergent flange surrounding the place of the shaft, of a shaft working in said bearing, oil splashing gearing within the casing and connected with the shaft and a plate oil splashing gearing connecting the shafts within the casing, and disks borne by the shafts respectively and each rovided with an annular lateral flange pro ecting toward the adjacent side of the casing, each of said sides of the casing being provided with an annular divergent flange projecting toward the corresponding disk within its flange.

4. The combination with an oil containing casing having an internal annular plane faced flange forming externally an acute angle with the plane of the casing wall, of a shaft entering the casing within said flange and perpendicularly to the plane of its face, a plate borneby the shaft, in contact with said face, and itselfprovided with 'an annular flange projecting over the flange of less diameter borne by the casing wall. I

5. The combination with a separable oil containing casing, of a shaft bearing projecting inward from the wall of the casing andforming an annular divergent flange, a shaft mounted in said bearing, a disk fixed to the shaft in close proximity to the end of said bearing and provided with a lateral annular flange projecting over the bearing flange.

6. The combination with a separable oil containing casing, of shaft bearings projecting from oppositesides into thespace within the casing and having the outer faces of the projectin portions divergent, shafts mounted in the earings, respectively, speed changing gearing connecting the shafts within the casing, disks fixed upon the shafts in close proximity to the end faces, respectively, of

said-bearings and provided with lateral an nular flanges projecting over the ends of the corresponding bearings and having their own inner surfaces divergent, substantially as set forth.

. DAVID OWEN JAMES.

lVitnesses:

JOHN GRANT, R..ROPER. 

